33211212112 has 120 divisors (see below), whose sum is σ = 72950241600. Its totient is φ = 14612742144.

The previous prime is 33211212077. The next prime is 33211212137. The reversal of 33211212112 is 21121211233.

It is a super-2 number, since 2×33211212112² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 33211212112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23570064 + ... + 23571472.

It is an arithmetic number, because the mean of its divisors is an integer number (607918680).

Almost surely, 2^33211212112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33211212112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36475120800).

33211212112 is an abundant number, since it is smaller than the sum of its proper divisors (39739029488).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33211212112 is a wasteful number, since it uses less digits than its factorization.

33211212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845 (or 1826 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 33211212112 its reverse (21121211233), we get a palindrome (54332423345).

It can be divided in two parts, 3321121 and 2112, that added together give a palindrome (3323233).

The spelling of 33211212112 in words is "thirty-three billion, two hundred eleven million, two hundred twelve thousand, one hundred twelve".